submarines
Tag
(146)1914
August
September
October
- 17
- British submarines enter the BalticOn 17–18 October 1914 the British submarines E1 and E9 forced their way through the Sound into the Baltic. They were to support the Russian fleet.
- Alarm at Scapa FlowOn 16–17 October 1914 an alarm over a supposed U-boat was raised at the Grand Fleet base, Scapa Flow. The fleet put to sea, though no submarine was ever found.
November
December
1915
January
February
March
April
May
July
August
- 19
- E1 torpedoes the battlecruiser MoltkeOn 19 August 1915 the British submarine E1 torpedoed the German battlecruiser Moltke in the Baltic. The ship did not sink, but was out of service for a month.
- Attack on the submarine E13On 19 August 1915 German torpedo boats shelled the British submarine E13, aground in Danish waters in the Sound. Fifteen British sailors were killed.
- Sinking of the ArabicOn 19 August 1915 U-24 torpedoed the liner Arabic off Ireland without warning. 44 people died, Americans among them, setting off a new crisis with the USA.
- Baralong sinks U-27On 19 August 1915 the British Q-ship Baralong sank U-27. Her crew shot the submarine's survivors, which became a notorious affair.
September
October
November
- 07
- Sinking of the cruiser UndineOn 7 November 1915 the British submarine E19 torpedoed the light cruiser Undine, escorting a ferry to Sweden, north of Rügen. About 24 men were killed.
- Sinking of the AnconaOn 7 November 1915 a submarine flying the Austro-Hungarian flag shelled and sank the Italian liner Ancona off Sardinia. About 200 died, Americans among them.
1916
February
March
April
May
July
August
October
November
- 22
- Resignation of JagowOn 22 November 1916 Gottlieb von Jagow left the head of German diplomacy, officially for his health, in reality over the dispute about submarine warfare.
- Zimmermann becomes foreign secretaryOn 22 November 1916 Arthur Zimmermann of Marggrabowa took charge of German diplomacy, the first commoner ever to head the Reich's Foreign Office.
December
1917
January
February
- 01
- Unrestricted submarine warfare beginsOn 1 February 1917 German submarines began sinking ships without warning around the British Isles. Neutral shipowners kept their ships in port.
- Norway changes its submarine rulesOn the eve of unrestricted submarine warfare Norway eased its ban on foreign submarines entering its waters. It was the price of a settlement with Germany.
March
April
- 13
- Bolivia breaks off relations with GermanyOn 13 April 1917 Bolivia gave the German minister his passports and broke off relations, citing submarine warfare and the torpedoing of the Tubantia.
- Japanese destroyers in the MediterraneanOn 13 April 1917 Rear Admiral Satō's Japanese 2nd Special Squadron, the cruiser Akashi and eight destroyers, reached Malta to escort transports.